collignon



A. COLLIGNON.

' CASTING MACHINE- I AiPLICATION mm mm. Is, 1920.

Patented Jan" 25, 1921.

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A. COLLIGNON.

CASTING MACHINE. PPPPPP ATION FILED v1.15, 1920;

1,366,875, Patented Jan. 25, 1921. 2 EEEEEEEEEEEE 2.

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UNITED STATES PATENT OFFICE...

ABMAND COLLIGNON, OF PARIS; FRANCE, ASSIGNOR TO THE FIRM I COLLIG-NON, OF PARIS, FRANCE.

CASTING-MACHINE.

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Patented Jan. 25, 1921.

Application filed March 15. 1920. Serial No. 365,972.

ing-WIachine, of which the following is a specification r This invention relates to a machine Ior molding metals, intended more particularly for dental apparatus, and its object is to' execute, by mechanical device, work which has hitherto been done with a hand bandage. A bandage requires, great professional skill, which is no longer necessary with this new machine which can be operated by any Said machine consists essentially of a frame provided with a drum which takes up a spiral spring wound up by means of a crank. Upon being released, the, spring causes the rotation of a nave provided'with an arm carrying an oscillating cage which accommodates the mold and rotates in a vertical plane.

The accompanying drawing given as exemplification, illustrates one of the modes of execution of this invention.

Figure 1 is a vertical section of the machine,

Fig. 2 is a front view. 7 V Fig. 3 is a section along A-A (Fig. 1), and

Fig. 4 shows a detail on a smaller scale.

At the upper part of the frame 1, 1s a drum 2 provided with a cover 7 and inclosing a powerful clock spring 3, one of the ends of which is fastened to a bolt 4, and the other to the engaging shaft 5 rotating on ball bearings 6 and 6.

Outside drum 2 is a nave 10 freely traversed by shaft 5 and engaged by the latter in one direction only by means of a ratchet wheel 8 which is integral with the shaft 5 and engages pawls 9, 9 pivotally attached to nave 1.0 (Flg. 3).

Upon nave 10 is fixed an arm 11 oneof small handle 18 allows of tated in order to disengage the cage from the arm 11.

-The mold is closed by a plate 51 0perated by a lever 19 pivoting on a shaft 20 and held in position by a pawl 21 which passes through the teeth of a fixed sector 22. The lever 19 is controlled by a handle 23. The shaft 20 is carried by an upright 52 which is integral with the cage 12.

Upon the opposite extremity of the arm 11, 1s a movable counterpoise 24, the travel of which may be regulated by means of a sliding block 25 which can be held in any position by means of a bolt 26; the end of such bolt engaging notches 27 in the arm 11'.

The counterpoise 24 is provided with a hook 28, which forms a spring and engages a projection 30 rigidly mounted upon the nave 10; Rubber buffers 31, 31 which deaden the shocks of the counterpoise in its two extreme positions are provided as shown.

A tappet 32 (Fig. 1) is adapted to receive one end and the shaft 13 for holding the cage stationary and this tappet is under the action of a spring 33 which latter is suitably arranged between the frame 1 and the tappet.

A connecting rod 34 is pivoted to tappet 32 and provided with a boss 35 which serves as a pivot in striking against the internal part of the frame when the rod 36, jointed to the lower end of the connecting rod 34, is operated by the release 37 capable of sliding along a groove-in the frame of the machine.

During the rotation of the cage, the tappet 32 is kept disengaged by a small bolt 38 pressing against the release 37, said bolt being pivotally attached to an axle 39.

The extremity of the shaft'5 can be fitted with a crank or handle 40 which serves to wind up the spring 3 and which can be withdrawn after the winding up.

Fig. 4 illustrates an automatic locking arrangement for the cover of the mold. In such arrangement the cover 51 jointed at 20 and subjected to the influence of a spring 53 which tends to lock it, carries a hook in engagement with the tappet 32 adapted to be actuated by the release 37. The result is that the cover becomes automatically locked so soon as the tappet is withdrawn.

the bolt being ro- The working of the above machine is as I follows in the cage 12 and the metal is arranged as at 55 on the packing of the mold, prepared in the ordinary way.

The metal is then melted with a blow pipe, the lid 51 of the mold being closed unless it is provlded with the automatic locking device as shown in Fig. 41:. Bolt 28 of the counterpoise 24: is then released and action is exerted upon release 37 so as to draw back tappet 32. Spring 8 immediately causes the rotation of shaft 5 which engages through the ratchet wheel 8 and the pawls 9, 9 with the nave 10 and arm 11. T he centrifugal force compels the cage 12 to take a position along the extension of the arm 11 and is'kept there by the bolt 14; which hooks on to the projection 17, At the same time counterpoise 24: moves away from the nave 10.

Under the influence of the centrifugal force, the molten metal is forced through the casting hole into cavity 56 provided for the purpose of the casting of the piece to be executed.

When spring 3 is completely unwound, the motion continues for some time by virtue of the inertia of the mobile members and when the rotation of the nave is almost nil, counterpoise 24 slides along the arm 11 and resumes its position near the nave and the rotation ceases. The cage is then immobilized again by tappet 32 which allows the mold to be removed and the spring 3 to be wound up for a new operation.

I claim:

1. A casting machine of the character described comprising a rotary member, a cage carried by said rotary member, a mold carried by said cage, means for retaining said rotary member against rotation, means for locking said mold within said cage means whereby the rotary member will be released and a countcrpoise slidable upon a rotary member substantially as and for the purpose specified. V

2. A casting machine of the character de scribed comprising a rotary member, a slidable counterpoise carried by said rotary member, a cage pivotally connected to said rotary member, a mold carried by said cage and means for retaining said cage in alinement with said rotary member.

3. A machine for casting metal comprisiug a frame, consisting of a base and a ten tical support, a shaft journaled within said support, a motor arranged within said support and connected to said shaft, a nave encircling said shaft, and operatively connected thereto, an arm secured to said nave, a cagepivotally connected to said arm, a mold supported within said cage, a spring actuated tappet arranged within said support and adapted to engage said cage, means arranged within said base for releasing said tappet, a counterpoise slidably mounted upon said arm and an adjustable bumper carried by said arm substantially as and for the purpose specified.

. ARMAND COLLIGNON. 

